#455B73
Closest named color: YInMn Blue (#415A77). oklch(46.3% 0.048 251), rgb(69, 91, 115).
Aa
White text reads best on this color (7.00:1).
About this color
#455B73 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.048 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.010 away. White text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #455B73 |
| RGB | rgb(69, 91, 115) |
| HSL | hsl(211, 25%, 36%) |
| OKLCH | oklch(46.3% 0.048 251) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #455B73 | 7.00:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #455B73 | 2.99:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #455B73 text on white | 7.00:1 | AAA | Lc 84.2 | Fine for body text |
| #455B73 text on black | 2.99:1 | Fails | Lc -17.7 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B6C2CF
oklch(80.9% 0.023 250.3)
-
Step 400
400
#90A3B7
oklch(70.7% 0.036 249.7)
-
Step 500
500
#758CA6
oklch(63.1% 0.047 251.7)
-
Step 600
600
#5D7691
oklch(55.6% 0.051 250.7)
-
Step 700
700 (this color)
#455B73
oklch(46.3% 0.048 251)
-
Step 800
800
#3F5164
oklch(42.8% 0.039 250.1)
-
Step 900
900
#364352
oklch(37.8% 0.031 252.3)
-
Step 950
950
#1F2730
oklch(26.9% 0.02 251.6)
#455B73 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #525C74 | 0.019 |
| Deuteranopia (no green cones) | #4C5773 | 0.015 |
| Tritanopia (no blue cones) | #356063 | 0.040 |
| Achromatopsia (no color) | #595959 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #455B73
#455B73
oklch(46.3% 0.048 251)
- #6A553B
#6A553B
oklch(46.4% 0.048 72.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #455B73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.010
- Dusty Grape #545775 ΔE 0.024
- Slate #516572 ΔE 0.037
- Dusk #4E5481 ΔE 0.037
- Denim #3B638C ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.053
Use #455B73 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.